Raymarine Drive Unit Selection

Raymarine Evolution systems accommodate hydraulic, mechanical and power assisted stern drive systems. If you are not sure how to determine what type of steering system is installed on your vessel, please consult an authorised Raymarine dealer.

The Drive unit is the part that interfaces with your vessel's steering system to keep you on the right course. Raymarine has a broad range of drive units to match almost any type of steering system.

Hydraulic Steering Systems

Raymarine Evolution pilots connect to hydraulic steering systems using a rugged hydraulic pump matched to the capacity of the hydraulic steering system.

If your system is hydraulic...

You'll need to find out the size (in cc) of the hydraulic cylinder ram(s) mounted to the rudder or inboard engined boats, or to the drive unit on outboard engined boats. Your steering system documentation will have this information.

Autopilot Tip

If you cannot find the ram size on your steering system documentation, you can look on the cylinder ram itself for the brand and model number. Once you have the number use our hydraulic cylinder ram cross-reference guide to determine which hydraulic autopilot pump is compatible with your vessel's hydraulic steering system.

HYDRAULIC PUMPS

Drive Type

Type 0.5 (12V)

Type 1 (12V or 24V)

Type 2 (12V or 24V)

Type 3 (12V or 24V)

Constant Running Pump (12V or 24V)

Part Number

12V: E12139

12V: M81120 24V: M81119

12V: M81121 24V: M81123

12V: M81122 24V: M81124

12V: E12171 24V: E12172

Vessel Displacement

Does not apply here. The drive unit is matched to the ram capacity of the steering system

Ram Capacity

50cc-110cc(3.1in3–6.7in3)

80cc – 230cc(4.9in3–14in3)

230cc – 350cc(14in3–21in3)

350cc – 500cc(21in3–30.5in3)

500cc - 1200cc(30.5in3 - 73in3)

Maximum Stall Pressure at 12V

50bar (750psi)

100bar (1450psi)

80bar (1160psi)

57 bar (827psi)

Peak Flow Rate (No Load)

650 cc/min

1000cc/min (67in3/min)

2000cc/min (122in3/min)

2900cc/min (175in3/min)

4500cc/min (274.6in3 / min)

ACU Used

ACU-100

ACU-200

ACU-400

ACU-300

Notes:

In some systems with dual steering rams in parallel, cylinder capacity is the total of both rams. Rams in series only require single capacity valve. Hydraulic steering systems with steering rams over 500cc require our larger constant running pump used in conjunction with the relevant ACU - contact Raymarine for details.

An authorised Raymarine dealer is best suited to installing a hydraulic autopilot system.

Type 0.5 suitable for Volvo D4/D6 Sterndrive applications.

Hydraulic Linear Drives

A hydraulic linear drive unit connects to the rudder stock via an independent tiller arm. Accessory fittings from your steering system manufacturer may be required. Must be able to back drive steering system for the rudder.

HYDRAULIC LINEAR DRIVES

Drive Type

Type 2

Type 3

Part Number

12V: E12207 24V: E12208

12V: M81202 24V: M81203

Maximum boat displacement

22,000 kg

35,000 kg

Peak thrust

585 kg

1,200 kg

Maximum stroke

254 mm

300 mm

Hard-over to hard-over times

10 seconds

10 seconds

Maximum rudder torque

1,270 Nm

3,200 Nm

Corepack used

ACU-400

ACU-400

Notes:

A hydraulic linear drive unit connects to the rudder stock via an independent tiller arm. Accessory fittings from your steering system manufacturer may be required.

An authorised Raymarine dealer is best suited for installing a linear drive system.

A linear drive unit connects to the rudder stock via an independent tiller arm. Accessory fittings from your steering manufacturer may be required. Must be able to back-drive steering system from the rudder.

MECHANICAL LINEAR DRIVE

Drive Type

Type 1

Type 2 Short

Type 2 Long

Part Number

12V: M81130

12V: M81131 | 24V: M81133

12V: M81132 | 24V: M81134

Maximum boat displacement

11,000 kg (24,000 lb)

15,000 kg (33,000 lb)

20,000 kg (44,000 lb)

Peak thrust

295 kg (650 lb)

480 kg (1,050 lb)

480 kg (1,050 lb)

Maximum stroke

300 mm (12")

300 mm (12")

400 mm (16")

Hard-over to hard-over times

11 seconds

11 seconds

14 seconds

Maximum rudder torque

735 nm (6,500 lb.in)

1,190 nm (10,500 lb.in)

1,660 nm (14,700 lb.in)

Power consumption

18-36 W

48-72 W

48-72 W

Corepack used

ACU-200

ACU-400

ACU-400

Notes:

A linear drive unit connects to the rudder stock via an independent tiller arm. Accessory fittings from your steering system manufacturer may be required.

An authorised Raymarine dealer is best suited for installing a linear drive system.

Must be able to back-drive steering system from the rudder.

Mechanical Rotary Drives

The rotary drive is designed for power and sailboat systems that can be driven from the helm position through a chain and sprocket (e.g. cable and rod steering system). The outstanding design of the Raymarine rotary drive unit provides smooth, powerful autopilot controlled steering with quiet operation.

Optional drive sprockets and modification to the steering chain may be required.

MECHANICAL ROTARY DRIVES

Drive Type

Type 1 12V: M81135

Type 2 12V: M81136 24V: M81137

Maximum boat displacement

11,000 kg

20,000 kg

Peak output torque

20 nm

34 nm

Maximum shaft speed

33 rpm

33 rpm

Recommended hard-over times (no load)

10 seconds

10 seconds

Power consumption

24-48 W

60-84 W

Corepack used

ACU-200

ACU-400

Notes:

Optional drive sprockets and modification to the steering chain may be required.

An authorised Raymarine dealer is best suited for installing a linear drive system.

Stern Drives

The stern drive is for use with inboard/outboard (I/O) vessels with power assisted steering.

STERN DRIVE

Part Numbers

Standard Sterndrive: M81138

Universal Sterndrive: E12026

Maximum boat displacement

Does not apply

Drive method

Electromechanical

Maximum thrust

150 kg

50kg

Recommended hard-over times

8.8 seconds

Maximum stroke

214 mm

Corepack used

ACU-200

Notes:

Always verify compatibility before installing a drive unit by consulting an authorised Raymarine dealer or Raymarine's Customer Support team.

Drive compatible with 1997 or later Mercruiser power assist inboard/outboard drives and Volvo Penta.

Vessels with 12V systems only.

An authorised Raymarine dealer is best suited for installing a linear drive system.

Hydraulic Steering Systems

Raymarine Evolution pilots connect to hydraulic steering systems using a rugged hydraulic pump matched to the capacity of the hydraulic steering system.

If your system is hydraulic...

You'll need to find out the size (in cc) of the hydraulic cylinder ram(s) mounted to the rudder or inboard engined boats, or to the drive unit on outboard engined boats. Your steering system documentation will have this information.

Autopilot Tip

If you cannot find the ram size on your steering system documentation, you can look on the cylinder ram itself for the brand and model number. Once you have the number use our hydraulic cylinder ram cross-reference guide to determine which hydraulic autopilot pump is compatible with your vessel's hydraulic steering system.

HYDRAULIC PUMPS

Drive Type

Type 0.5 (12V)

Type 1 (12V or 24V)

Type 2 (12V or 24V)

Type 3 (12V or 24V)

Constant Running Pump (12V or 24V)

Part Number

12V: E12139

12V: M81120 24V: M81119

12V: M81121 24V: M81123

12V: M81122 24V: M81124

12V: E12171 24V: E12172

Vessel Displacement

Does not apply here. The drive unit is matched to the ram capacity of the steering system

Ram Capacity

50cc-110cc(3.1in3–6.7in3)

80cc – 230cc(4.9in3–14in3)

230cc – 350cc(14in3–21in3)

350cc – 500cc(21in3–30.5in3)

500cc - 1200cc(30.5in3 - 73in3)

Maximum Stall Pressure at 12V

50bar (750psi)

100bar (1450psi)

80bar (1160psi)

57 bar (827psi)

Peak Flow Rate (No Load)

650 cc/min

1000cc/min (67in3/min)

2000cc/min (122in3/min)

2900cc/min (175in3/min)

4500cc/min (274.6in3 / min)

ACU Used

ACU-100

ACU-200

ACU-400

ACU-300

Notes:

In some systems with dual steering rams in parallel, cylinder capacity is the total of both rams. Rams in series only require single capacity valve. Hydraulic steering systems with steering rams over 500cc require our larger constant running pump used in conjunction with the relevant ACU - contact Raymarine for details.

An authorised Raymarine dealer is best suited to installing a hydraulic autopilot system.

Type 0.5 suitable for Volvo D4/D6 Sterndrive applications.

Hydraulic Linear Drives

A hydraulic linear drive unit connects to the rudder stock via an independent tiller arm. Accessory fittings from your steering system manufacturer may be required. Must be able to back drive steering system for the rudder.

HYDRAULIC LINEAR DRIVES

Drive Type

Type 2

Type 3

Part Number

12V: E12207 24V: E12208

12V: M81202 24V: M81203

Maximum boat displacement

22,000 kg

35,000 kg

Peak thrust

585 kg

1,200 kg

Maximum stroke

254 mm

300 mm

Hard-over to hard-over times

10 seconds

10 seconds

Maximum rudder torque

1,270 Nm

3,200 Nm

Corepack used

ACU-400

ACU-400

Notes:

A hydraulic linear drive unit connects to the rudder stock via an independent tiller arm. Accessory fittings from your steering system manufacturer may be required.

An authorised Raymarine dealer is best suited for installing a linear drive system.

A linear drive unit connects to the rudder stock via an independent tiller arm. Accessory fittings from your steering manufacturer may be required. Must be able to back-drive steering system from the rudder.

MECHANICAL LINEAR DRIVE

Drive Type

Type 1

Type 2 Short

Type 2 Long

Part Number

12V: M81130

12V: M81131 | 24V: M81133

12V: M81132 | 24V: M81134

Maximum boat displacement

11,000 kg (24,000 lb)

15,000 kg (33,000 lb)

20,000 kg (44,000 lb)

Peak thrust

295 kg (650 lb)

480 kg (1,050 lb)

480 kg (1,050 lb)

Maximum stroke

300 mm (12")

300 mm (12")

400 mm (16")

Hard-over to hard-over times

11 seconds

11 seconds

14 seconds

Maximum rudder torque

735 nm (6,500 lb.in)

1,190 nm (10,500 lb.in)

1,660 nm (14,700 lb.in)

Power consumption

18-36 W

48-72 W

48-72 W

Corepack used

ACU-200

ACU-400

ACU-400

Notes:

A linear drive unit connects to the rudder stock via an independent tiller arm. Accessory fittings from your steering system manufacturer may be required.

An authorised Raymarine dealer is best suited for installing a linear drive system.

Must be able to back-drive steering system from the rudder.

Mechanical Rotary Drives

The rotary drive is designed for power and sailboat systems that can be driven from the helm position through a chain and sprocket (e.g. cable and rod steering system). The outstanding design of the Raymarine rotary drive unit provides smooth, powerful autopilot controlled steering with quiet operation.

Optional drive sprockets and modification to the steering chain may be required.

MECHANICAL ROTARY DRIVES

Drive Type

Type 1 12V: M81135

Type 2 12V: M81136 24V: M81137

Maximum boat displacement

11,000 kg

20,000 kg

Peak output torque

20 nm

34 nm

Maximum shaft speed

33 rpm

33 rpm

Recommended hard-over times (no load)

10 seconds

10 seconds

Power consumption

24-48 W

60-84 W

Corepack used

ACU-200

ACU-400

Notes:

Optional drive sprockets and modification to the steering chain may be required.

An authorised Raymarine dealer is best suited for installing a linear drive system.

Stern Drives

The stern drive is for use with inboard/outboard (I/O) vessels with power assisted steering.

STERN DRIVE

Part Numbers

Standard Sterndrive: M81138

Universal Sterndrive: E12026

Maximum boat displacement

Does not apply

Drive method

Electromechanical

Maximum thrust

150 kg

50kg

Recommended hard-over times

8.8 seconds

Maximum stroke

214 mm

Corepack used

ACU-200

Notes:

Always verify compatibility before installing a drive unit by consulting an authorised Raymarine dealer or Raymarine's Customer Support team.

Drive compatible with 1997 or later Mercruiser power assist inboard/outboard drives and Volvo Penta.

Vessels with 12V systems only.

An authorised Raymarine dealer is best suited for installing a linear drive system.